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8. Room Temperature Thermistor Circuit
Fig. 8-1 shows the room temperature
G
thermistor circuit.
5V
Room
temperature
thermistor
R310
A
0V
9. Heat exchanger temperature thermistor circuit
The circuit detects the indoor heat
G
exchanger temperature and controls
the following.
(1) Low-temperature defrosting during
cooling
operation.
The voltage at A depends on the heat
exchanger temperature as shown in
Fig. 9-2.
0301E (30CH6) pg 47-68
Micro
computer
R309
Room
64
temp. input
C302
0V
Fig. 8-1
5V
Heat exchanger
temperature thermistor
R307
R304
R308
A
0V
Q301
0V
and
dehumidifying
53
The voltage at A depends on the room
G
temperature as shown in Fig. 8-2.
5
4
3
2
1
0
0
Micro computer
Heat
63
exchanger
C301
temperature
input
0V
Fig. 9-1
5
4
3
2
1
0
-10
0
– 53 –
16/12/05, 2:49 PM
10
20
30
40
Fig. 8-2
10
20
30
Fig. 9-2
40
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